Automated snippet conversion by scripts

These changes are purely mechanical to differentiate them from manual
fixes/adjustments made in the next commit.
This results in broken code as some snippets contain errors.

Made in four steps:
1. Run ./migrate-snippet.py that converts `.md` files to code files
   and perhaps adds missing lines under `// @hide` comments.
2. Sort Java imports.
3. Remove old `.md` files.
4. Run ./generate.md to produce `*/generated/*.md` files.

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/bash.sh

@@ -0,0 +1,17 @@
+curl -X POST http://localhost:6333/collections/aliases \
+  -H 'Content-Type: application/json' \
+  --data-raw '{
+    "actions": [
+        {
+            "delete_alias": {
+                "alias_name": "production_collection"
+            }
+        },
+        {
+            "create_alias": {
+                "collection_name": "example_collection",
+                "alias_name": "production_collection"
+            }
+        }
+    ]
+}'

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/csharp.cs

@@ -0,0 +1,10 @@
+
+
+public class Snippet
+{
+	public static async Task Run()
+	{
+		await client.DeleteAliasAsync("production_collection");
+		await client.CreateAliasAsync(aliasName: "production_collection", collectionName: "example_collection");
+	}
+}

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/go.go

@@ -0,0 +1,8 @@
+package snippet
+
+import "context"
+
+func Main() {
+	client.DeleteAlias(context.Background(), "production_collection")
+	client.CreateAlias(context.Background(), "production_collection", "example_collection")
+}

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/java.java

@@ -0,0 +1,8 @@
+package com.example.snippets_amalgamation;
+
+public class Snippet {
+        public static void run() throws Exception {
+                client.deleteAliasAsync("production_collection").get();
+                client.createAliasAsync("production_collection", "example_collection").get();
+        }
+}

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/python.py

@@ -0,0 +1,16 @@
+from qdrant_client import QdrantClient, models  # @hide
+
+client = QdrantClient(url="http://localhost:6333")  # @hide
+
+client.update_collection_aliases(
+    change_aliases_operations=[
+        models.DeleteAliasOperation(
+            delete_alias=models.DeleteAlias(alias_name="production_collection")
+        ),
+        models.CreateAliasOperation(
+            create_alias=models.CreateAlias(
+                collection_name="example_collection", alias_name="production_collection"
+            )
+        ),
+    ]
+)

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/rust.rs

@@ -0,0 +1,13 @@
+use qdrant_client::qdrant::CreateAliasBuilder;
+
+pub async fn main() -> anyhow::Result<()> {
+    client.delete_alias("production_collection").await?;
+    client
+        .create_alias(CreateAliasBuilder::new(
+            "example_collection",
+            "production_collection",
+        ))
+        .await?;
+
+    Ok(())
+}

qdrant-landing/content/documentation/headless/snippets/collection-aliases/switch/typescript.ts

@@ -0,0 +1,19 @@
+import { QdrantClient } from "@qdrant/js-client-rest"; // @hide
+
+const client = new QdrantClient({ host: "localhost", port: 6333 }); // @hide
+
+client.updateCollectionAliases({
+  actions: [
+    {
+      delete_alias: {
+        alias_name: "production_collection",
+      },
+    },
+    {
+      create_alias: {
+        collection_name: "example_collection",
+        alias_name: "production_collection",
+      },
+    },
+  ],
+});